Audio/Video sync issues on Krypton in HD only.

Hi,

I have been using Kodi 16.1 as and NextPVR client for several months now and everything seems to work quite well. This past week I updated 3 of my clients to Krypton 17b6 and have noticed issues on 2 of the 3 clients, where the 3rd client has no issue.

Issue: With 16.1, all clients play fine on both SD & HD channels. On all 3 clients SD channels play fine. However, when playing an HD channel, two of the clients audio are significantly out of sync with the video. Additionally, on those two problematic clients, there is a continuous momentary pause in play ~ 1 sec. occurring about once every 15 sec. Again, no such issues with Jarvis with same exact clients.

Anyone else seeing this on HD in Krypton?

Configuration:
NextPVR back end on headless server.
client 1 – quad core athlon with HD8330 video, running LibreElec alpha9 – this client has no issues with 17b6
client 2 – triple core AMD Phenom, HD 3000 video, Windows 10 – 17b6 has problems with HD channels.
client 3 – Pentium D @ 3.4ghz, AMD HD5450 video, Windows 10 – 17b6 has problems with HD channels.

I stepped the clients back to 17b5 and issues were present there as well.

Any suggestions?

Thanks.